Wow. This will be a nice fight.
Lister by (T)KO - unlikely
Lister has never won by KO, and Okami has only been finished by KO once.
Lister by Sub - unlikely
Lister has finished 9 of his 11 wins by submission. But....Okami has never been submitted. So it is unlikely, but this is MMA.
Lister by UD - unlikely
Lister is not much of a striker. If it stays on the feet, I think Okami will have the advantage. And if it goes to the ground, I think Okami will be taking it there, him being the bigger stronger fighter.
Okami by (T)KO - unlikely
Okami does have decent striking, but I think Lister has solid defense standing, and on the ground.
Okami by Sub - extremely unlikely
No explanation needed. I'm not saying it's not possible just, you know.
Okami by UD - likely


Okami is huge a huge MW who is solid in all areas. He can control the fight with his strength, striking, and wrestling. All of which, I think are superior to Lister's. And if it goes to the ground, I think his JJ defense is solid as well.
Okami by UD. For the record, I am rooting for Lister.